Rotary pump.



c. w. voLLMANN.

ROTARY PUMP. APPLICATION FILED APB. 18,1904.

` iff/fm 23.511 HozncnJ amines-oca C. W. VOLLMANN. ROTARY PUMP.

l APPLIOATIoN FILED Arx. 18,1904.v 944,708. Patented Dec. 28, 1909.

3 SHEETS-SHEET 2.

zwi/MM witnesses 3 vw@ nto@ c. w. VOLLMANN.

ROTARY PUMP.

APPLIOATION FILED APR. 18, 1904.

. Patented Dec.28, 1909.

3 SHEETS-:SHEET 3.

Witness@ 30 compressor.

- UNrrnD sririns PATENT onirica.

ROTARY PUMP. i

aimes.

Be it known that I, CARL WILHELM Vonn-v7 MAN, ofthe city of Montreal,Province of Quebec, Canada, haveY inventedcertain new and useful Iniprovements in Rotary Pumps; and Ido hereby declare tliatthe following'vis a full, ielear, and exact description of the saine.

Atypenin which sliding blades are utilized,

ande-'it has'forits' object tov improve the packing and lubricationthereof. c

The invention `may be said/briefly .to conv sist of a particularconstructionof an antifi'iction packing together with a lubricatingsystem used inconjunction therewith. F or. 'c full comprehension,however, of my invention referencemust be had to the accompanyingdrawings forming apartA of this a specication wherein like symbols,indicate corresponding parts and in which, l y Figure 1 is alongitudinal" vertical sec- `tional, view of .a rotary pumping engineprovided with my invention; Fig. 2 is a transverse Il'vertical sectionalview thereof;

and Fig. 3 is a diagrammatical view illustrating the connectionofmyimproved ,lul bricating means to the delivery end of a The cylinder isindicated at 7J and has suciion'and delivery ports cand al respectivelyand 'a check valve. e separating the interior of Vthe cylinder fromthedelivery port,

while a hub `f Awhich carries the blades is provided with trunnions gsupported -in bearing caps 71, constituting cylinder heads. All of theseparts'are, inthe main,

of the construction usually employed in this 40 type of engine, and theywill not, therefore be described in detail, but the locationof the checkvalve in a' rotary compressing engine,

is a feature of the invention.

' In order 'to reduce the frictibn, between the radially outer edge ofeach blade and the .interior ofthe -`cylinder wall I insert in a recess2 insuch edge a round bar' 3 having one side shear-ed 0H as at 4 on acurved line concentric to'said cylinder wall and its ends transverselyrecessed as at 5. T isfbar also serves as a packing, and the side edgesof the blades, toward the cylinder' heads are provided with packing, 6,bearing yieldingly toward the said cylinder heads under the inuence ofbow springs 7. These packing strips have their ends nearest thecylindrical wall diminished and extended a shortdistance beyond fthe-endof the'blades'as at 8 to 'bear in the recessed ends ofthe bars 3.

1,A tight joint is eifected according to this i Patented nee. 'es,ieee.l

invention between the side edges of the hub 'and the-blades, andthe-inner 'faces of the `cylinder heads by packing devices held iii 4 ybearing relationwith the side edgesof said My invention relatesparticularly to ro- 10 tary compressing 'or pumping engines of the yhuband' blades under a. pressure proportinal tothe"pressuie of the. motiveiuid the leakage whereof. it is desired t6r prevent. To this end I formthe cylinder of lslightly greater length than thehub'and blades andplace a packing disk A10 between one end of these partsand the adjacentcyliiider head. -As an instance I'show thisy diskr between the hub ,andblades and-the cylinder head la This die; has an axially exten-dingperipheral, steadying flange 11' which\ encircles and is steadied uponan annular shoulder 12 upon the inner side of cylinder head 71, andformed `by-inwardly increasing the thickness lof the rmiddle portion ofsuch head. When it is necessary to prevent the leakage of a fluid beingacted vupon of abnormallyfhi h penetrative power, -or a mo- `tive fluido abnormally high'pressure, the disk is annularly recessed, as at 15,concentric to and in line with the periphery ofthe hub, and a rin 16 iscomparatively loosely set therein, wlii e'the opposite cylinder head,

71,', is correspondingly recessed as-at 17 and has a ring 18 similarlset therein.

\ In order to maintain the disk andptrhe rings'16 and'18 in bearingrelation with the 'blades and hub, and charge the bearings with alubricant, alliinder a pressure commensurate with that of the fluidwithin the cylinder, I form avrigid collar 20upon the diskl vvthusestabljishing av-space. 21 between the latter and cylinderliead 71,while I construct the cylinder heads 7i, andl 7L of such depth as toprovide shallow spaces 22 and 23 at the outside ends of the -truiinionsg. recess '15 is made to communicate with the space 21 by a. duct 25,and such space is in turn, made-torcoinmunicate with the topl of' apressure chamber or reservoir 50, containing the lubricant and to whichthe' delivery i pipe 51 from the compressor leads and-from which thelubricant is taken by pipe 53 while a pipe 52 conducts the dischargedcompressed luidffrpin the chamber or reservoir to any vdesired point ofdistribution or consumption. A branch 28 leads-from this pi e 53 to aduct/2'( formed in the frame o the coinpressor and having a series ofbranches one of which communicates with the space 22 another, 26,@communicates with the space .21 and if applied to a rotary engine, thepipe 51 Will be connected to the steam chest thereof or othen point ofsupply. The. recess.17

and space 23 are connected to the source of pressure by branch ducts l30and 31 of a main duct 32 'and a pipe 33, the latter constituting abranch of the pipe`53$vvhile each of the spaces 22 and 23 are causedf`to communicate with and lubricate the contact faces of the blades, thepacking strips and bars,

and the disk, by axial channels 34' in the perimeter of the trunnions g.

It is `iobviolusthat an engine, Whether a puiiping engine or other type,provided with my invention will have its parts thoroughly lubricated,and that the lubricant employed C will be held constantly upon the saidparts by a pressure commensurate with the pressure under which theengine works. I

I do-not claim the specific construction of the blades disclosed "as thesaine forms the subject matter' of an application filed by me on July 8,1904;, under No. 215,819 and is a 5 ing member in bearing position. Y 2.The combination with a cylinder,andv

a revoluble iston therein, of a packing disk lcarried by t e cylinderand effecting a tight lrelation with one si joint between one side ofthe piston and the wall of the cylinder and means whereby a lubricant ina fluid state and under pressure maintains the packing diskiinbearing eof the said piston.

3. The combination with a cylinder, and

a revoluble piston therein, of a packing disk carried by the cylinderand effecting a tight joint between one sideof the piston and the wallof the cylinder, such disk being located a short distance vfrom one endof the cylinder, a chamber constructed to contain a lubricant', aconductor communicating with 'the cylinder and adapted to conduct a highpressure fluidfthe chamber communicating wlthl the conductor, and acommunicating duct adapted to. conduct a high pressure fluid and leadingfrom the chamber to thc space between the disknnd the adjacent end ofthe cylinder.

A. 4. A rotary engine comprising a cylinder. cylinder heads closing theends of said cylinder and having bearings ,formed in one therewith,arotary hub within the cylinder and having truiinionsprojecting intosuch bearings, the trunnions having axial grooves in the perimetersthereof and being stifliciently less in length thanthe bearings toprovide spaces at the ends thereof, and means for supplying oil underpressure to such spaces, for the purpose set forth.

In testimony whereof, I have affixed my A signature, in presence of twowitnesses.

CARL IVILHELM VVOLLMANN.

Witnesses:

FRED' J. SEARS, l ARTHUR H. EvANs.

